Carburetor choke mechanism



Patented Oct. 7, 1952 UNITED STATES PATENT OFFICE oAaBUaE'ron CHOKE MECHANISM Harvey G. MoorahRochestefiN Y assignor to v Alex D. Karpoff, ,Bst0n,, Mass., doing businessas American Mufifler Co.

ApplicatibnfJulyZS, 1948;1SerialNo. 41,063

holes or other work upon the carburetor or asso-' ciated parts for receiving part of the manually operated mechanism, but which is readily secur able .to parts already in position when the automatic choke actuator has been removed.

Referring to the drawings,

Figure 1 is a perspective view of a carburetor to which the choke actuating mechanism of this invention is shown attached.

Figure 2 is a fragmentary side elevation to a larger scale of the same.

Figure. 3 is a top plan view partly broken away of the parts shown in Figure 2.

Figure 4 is an exploded perspective view showing the choke actuating parts.

Figure 5 is a detail sectional view to a larger scale on line 5--5 of Figure 2.

Figure 6 is a fragmentary side elevation of a different form of carburetor but showing somewhat similar' choke actuating parts applied thereto.

Referring first to Figures 1 to 3, and 5, at I is shown a carburetor having an air intake portion 2 within which is mounted a choke valve 3 car- 1 ried by a rock shaft 4. Thi rock shaft extends.

outwardly from the carburetor and at its outer end has secured thereto a crank arm 5 having an out-turned outer end as at 6. Substantially concentric with the shaft 4 the carbureter is provided with an annular outwardly extending flange I having angularly spaced therearound three lateral extensions 8 which are provided with parallel threaded openings for the reception of screws. This annular flange is provided for the attachment to the carburetor of automatic temperature controlled choke actuating means, but for the purpose of this invention this mean has been removed, leaving only the parts as shown. Two of the extensions 8 are made use of for the purpose of this invention for the securement to the carbureter of a, frame member I0. As shown this frame member ID is arcuate' in shape and its central portion l l is laterally off- 1- claim. (01. 14-501.)

set-iromthe-outer faceofthe flange 10 as shown best. in Figure-3. Thi isfor the purpose of rendering. more; accessible; the crank arm 5'for the attachment. of other parts thereto. 5 The frame member; ID. has a pair-of spaced holes 12 therethrough mating the two upper holes of the extension 8 and screws at [4 are passed through these holes and threaded into these holes of the carburetor.

The frame member III has an extension l5 at one end to which is secured as by screws IS a loop shaped clamp I! which secures one end of a pull wire cover IS. A pull wire 19 is axially movable through the cover and its inner end is operatively secured to the crank arm 5. This operative connection. as shown, includes a post 20 having areduced diameter portion, 2| (see Figure 5) journaled in an angle element 22 and held inv place therein by a washer 23 over which the inner end of the post 20 is headed as at 24. This post 20 i provided with a lateral perforation 25 therethrough to receive the inner end of the pull wire I9 which is secured in place therein as by a set screw 26. The angle element 22 has a foot provided with a recess to receive the forwardly turned'end 29 of the crank arm 5 and a clamp plate 21 is secured to the angle element 22 as by means of clamp screws 28 and clamps the element 22 to the crank end 29. The end of the pull wire is thus rockably mounted with respect to the crank arm 5 so that it is free to turn the crank arm by its longitudinal motion.

The opposite end of the pull wire cover is attached in any suitable way to the vehicle dashboard 30 as shown in Figure 4 and the opposite end of the pull wire is provided with a suitable manually controlled knob 3|.

In Figure 6 a slightly difierentform of actuator is shown in which the crank arm carried by the shaft 36 which carries the choke valve 3'! is much shorter than in the construction shown in Figures 1 to 3 and 5, and the annular flange 38 which is normally intended to have secured thereto the automatic choke mechanism is provided with a pair of substantially diametrically oppositely positioned screw holes for screws at 40. The frame element to which the pull wire cover clamp His applied is, in this type of carbureter, formed with spaced holes for receiving the screws and preferably this member 4| is provided with a downwardly'bowed portion which may engage the outer face of the flange 38 between the screws 40. The pull wire I9 is then operatively attached to-the short crank arm 35 by means which may be the same as that heretofore described for at- 3 tachment to the crank arm .5 and which will therefore not be further described herein. The opposite end of the pull wire and pull wire cover are mounted as previously described.

From the foregoing description of certain embodiments of this invention it should be evident to those skilled in the art that various changes and modifications might be made therein without departing from its spirit or scope.

I claim:

The combination with a carbureter, a rock shaft therein and extending outwardly thereof and provided with a crank arm at its outer end having an outwardly turned end, said carbureter having a wall portion having an outer face provided with spaced screw holes, of a frame memher having holes spaced to mate said screw holes.

screws securing said member to said wall Dortion, a pull wire casing, a' clamp for one end of said casing carried by said frame member, a pullwire axially movable within said casing, a perforated post, an element on which said post is pivotally mounted, means for clamping said element to the outwardly turned end of said-crank arm, means clamping the inner end portion of 4 said pull wire within the perforation of said post, and manually operated means connected to the opposite end portion of said pull wire.

HARVEY G. MOORE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

